Effects of glyoxal cross-linking on baked starch foam

Uslu M., Polat S.

CARBOHYDRATE POLYMERS, vol.87, no.3, pp.1994-1999, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 87 Issue: 3
  • Publication Date: 2012
  • Doi Number: 10.1016/j.carbpol.2011.10.008
  • Journal Name: CARBOHYDRATE POLYMERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1994-1999
  • Keywords: Corn starch, Foam, Cross-linking, Glyoxal, Biodegradable, SUPERCRITICAL-FLUID EXTRUSION, SOLVENT EXCHANGE TECHNIQUE, MICROCELLULAR FOAM, PHYSICAL-PROPERTIES, BAKING PROCESS, ACETATE, FIBERS
  • Çukurova University Affiliated: No

Abstract

Starch trays and plates were prepared from native corn starch and corn starch cross-linked with glyoxal at different concentrations (0.126, 0.269, 0.271, 0.468 g/kg) using a foam baking process. The effect of cross-linking on baking parameters, including density, colour, water absorption, and tensile and flexural properties, was determined. Also, the morphologies of the trays were examined using a scanning electron microscope. Cross-linking considerably reduced the baking time, density and water absorption of the trays. Trays made from starch cross-linked with 0.126 and 0.269 g/kg glyoxal presented the best properties, with a homogenous microstructure and smooth surface quality. These trays had the lowest density (0.27 g/cm(3)) and had approximately 53% reduction in water absorption. Moreover, both the tensile and flexural strain of these foams was significantly higher than other foams. (C) 2011 Elsevier Ltd. All rights reserved.